Dwyer Instruments SERIES 655A Catalog Page
#22
G
[44.45]
,
655A-XX-P MODELS
655A-XX-C MODELS
1/4˝ FEMALE
[64.77]
SERIES 655A
316 WET/WET DIFFERENTIAL PRESSURE TRANSMITTER
Ranges Down to 3 in w.c., 6-Point NIST Certicate Included
NPT
1-1/4
[31.75]
4 WIRE CABLE
2-35/64
2
[50.80]
4-3/4
[120.65]
A-232 CONNECTOR END
OPPOSITE END IS SIX WIRES
COLORS: RED, BLACK, GREEN
WHITE, BLUE AND BROWN
Liquid & Gas
The Series 655A 316 Wet/Wet Differential Pressure Transmitter is designed for
high static/low DP applications designed especially for the End Users and OEM’s
where extreme overpressure and high performance of 0.25% accuracy and stability
are required at ranges down to 3 in w.c. Each unit includes a 6-point NIST certicate of
calibration which demonstrates the unit’s high level of performance.
FEATURES/BENEFITS
• Extreme overpressure and stability at low ranges provides durable device for OEM
and end-user applications
• High-accuracy device for low differential pressure designs requiring more precise
measurements in support of application
• NIST certicate available to demonstrate high-level of performance
APPLICATIONS
• Pump differential pressure
• Critical process monitoring
MODEL CHART
Model Range Model Range
655A-00-C
655A-01-C
655A-02-C
655A-03-C
655A-04-C
655A-05-C
655A-06-C
655A-07-C
Note: Change ‘C’ to ‘P’ for optional 6 pin male connection.
0 to 3 in w.c.
0 to 5 in w.c.
0 to 8 in w.c.
0 to 10 in w.c.
0 to 15 in w.c.
0 to 20 in w.c.
0 to 1 psid
0 to 2 psid
• High accuracy/low differential
pressure OEM applications
655A-00-P
655A-01-P
655A-02-P
655A-03-P
655A-04-P
655A-05-P
655A-06-P
655A-07-P
0 to 3 in w.c.
0 to 5 in w.c.
0 to 8 in w.c.
0 to 10 in w.c.
0 to 15 in w.c.
0 to 20 in w.c.
0 to 1 psid
0 to 2 psid
SPECIFICATIONS
Service: Compatible gases or liquids.
Wetted Materials: 316L SS.
Accuracy: ±0.25% BFSL, RSS (combined effect of non-linearity, hysteresis, and
repeatability).
Stability: ≤ ±0.25% FSO/yr.
Temperature Limits: -20 to 200°F (-29 to 93°C).
Compensated Temperature Limits: 0 to 170°F (-17.8 to 76.7°C).
Pressure Limits: 1000 psi (68.95 bar) continuous; 3000 psi (206.8 bar) burst.
Thermal Effects: ≤ ±1.5% FS oven comp. temperature range.
Power Requirements: 8-38 VDC.
Output Signal: 4-20 mA.
Static Pressure Effects: On zero: ≤ ±0.25% FSO per 1000 psi; on span: ≤ ±0.5%
of reading per 1000 psi.
Response Time: < 10 ms.
Loop Resistance: 1500 Ω.
Electrical Connections: Cable exit with 24˝ cable; optional 6-pin connector.
Process Connections: 1/4˝ NPT female.
Enclosure Rating: Designed to meet NEMA 4X (IP66).
Mounting Orientation: Mount in vertical position: zero shifts up to ±1 in w.c.
depending on orientation.
Weight: 18 oz (510 g).
ACCESSORIES
Model Description
A-232 Connection with cable (3´); for 6 pin connection models
DWYER INSTRUMENTS, INC.
75
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